Web winding apparatus



March 17, 1970 A. J. HELLEMANS 3,501,104

I WEB WINDING APPARATUS Filed Feb. 2, 1968 9 Sheets-Sheet 1 INVENT ORATTORNEY March 17, 1970 Filed Feb. 2, 1968 i A. J. HELLEMANS 3,501,104

WEB WINDING APPARATUS 9 Sheets-Sheet 2 FIG. 71)

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WEB WINDING APPARATUS Filed Feb. 2, 1968 9 Shets-Sheet 5 a: l m 35 J 27(Q H0 m INVENT OR ATTORNEY 'Mmh 17, 1970 A. J. HELLEMANS 3,501,104

WEB WINDING APPARATUS Filed Feb. 2, 1968 9 Sheets-Sheet 6 FIG. 5

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WEB WINDING APPARATUS Filed Feb. 2, 1968 9 Sheets-Sheet 8 INVENTOR Zw, wATTORNEY 'Ma'rch 17, 1970 Filed Feb. 2, 1968 A. J. HELLEMANS WEB WINDINGAPPARATUS 9 Sheets-Sheet 9 IOO'E I roe 1 :09

E310] E500 rjjfi F I 6.9 I MENTOR BY 1 M 00%;? flMM M0 2 ATTORNEY UnitedStates Patent U.S. Cl. 242-56 14 Claims ABSTRACT OF THE DISCLOSURE A webwinding apparatus in which the web is transferred from one rotating coreto another without interruption. An arcuate guide plate extendspartially around the periphery of the new core to define with the coreperiphery a narrow passageway into which the web end is threaded afterbeing severed from the remainder of the web. A nozzle situated on theweb path opposite the guide plate emits a stream of air under presure asthe web end is severed, the stream of air entering the entrance of thethreading passageway generally in the direction of the passageway, theeffect of the air stream being to direct the severed web end into thepasageway and bias the same into contact with the rotating coreperiphery so that the web end becomes wound upon the core. Preferably,the guide plate extends around a portion of the core periphery in excessof 180 and is formed in two sections so as to be separable from oneanother to permit the guide plate to be moved to inoperative positionremote from the web core so that unconfined winding can take place. Aweb cutter may be formed integrally with the air nozzle.

This invention relates to web winding apparatus for use in severing atravelling web along a transverse line and causing the web portionupstream of such line to ,wind onto a rotating core without interruptingthe motion of the web.

The invention is particularly intended for use with machines forcoating, drying, calendering or otherwise treating a continuouslytravelling web drawn from a roll, wherein a winder is provided withpivotal arms which carry at their extremities cores for Winding up theweb. As a roll of web has been wound up upon one corethe web must besevered and the newly formed end of the Web must be secured to anothercore for winding another roll of web thereon without interruption of thetreating process. After the winding of the web on the other core hasstarted, the arms of the winder are pivoted for locating the other coreat the position previously taken by the one core, and said one core withthe roll of web is taken away from the winder and replaced by a new corefor receiving a further roll of web.

A number of apparatus of the described kind require particular cor-eswith peripheral openings and the interior of which is maintained undervacuum for securing the end of the web. Other apparatus require coreswith adhesives applied thereto in order to secure the web end.

Further, the known apparatus are not suited for conveniently treatingthin webs with larger widths, say webs with a width of 1.20 m. and athickness of 0.05 mm., since they inevitably cause wrinkling of the web.

An object of the present invention is to provide a web winding apparatuswhich permits the use of conventional cores and core holders which areused in large quantities in machines where the severing of the web andthe wrapping of the newly formed end onto a core is done :by hand.

A web winding apparatus according to the present invention comprises aweb guide mounted for prede termined displacement to and from anoperative position and shaped so that in that position it can definewith a suitably located driven core a pathway extending partly aroundthe core, a web cutter displaceable from an inoperative position to anoperative position at or near one end of said pathway for transverselysevering a web during its travel past a said driven core, and means fordelivering a stream of air in a direction across said notional web pathfrom the cutter side thereof and at a position or positions such thatwhen severance of a said web by the cutter takes place while the web istravelling past a said rotating core but in contact therewith and in adirection corresponding with the direction of rotation of such core,such air stream or streams will constrain or help to constrain thefreshly cut web end at the upstream side of the line of cut to followthe periphery of such core and to enter said pathway so that the websection upstream of such line of cut becomes wound up on said core. I

The web guide which cooperates with the driven core may be in the formof a trough, e.g., a trough with a cylindrical interior defining withthe core periphery a narrow annular passage for the leading end of theweb section to be wound on such core. The trough may subtend an angle ofmore than if it is formed in hinged sections which can close around thecore.

It is preferable for the web guide and the web cutter to be mounted onpivoted arms which can swing towards the web path from opposite sidesthereof.

A freely rotatable roller may be provided which before the severance ofthe web presses same against the driven core on which the web sectionupstream of the line of cut is to be wound.

The cutter preferably cuts the Web in a position at or in the entry endof the guide pathway along which the said upstream web section is to beconducted.

The cutting operation is assisted if the web is held against or near tothe web guide at the entry end of said guide passage during theseverance of the web. This disposition of the web against or close'tothe web guide maybe ensured by means of a deflecting roller or othermember which presses against the web at a position a little downstreamof the cutting position.

For purposes of the present invention the term air stream envisions alaminar sheet or laminar sheets of air or a plurality of jets of air,produced by forcing air through an air delivery slot or slots or airdelivery openings of other form disposed along one or more linestransverse to the web. Such discharge openings may be openings in ablower tube mounted for movement with the web cutter. As will bedescribed hereafter, the direction of a stream of air along the narrowpathway between the driven core and the web guide materially assist inthe initial guidance of the upstream web section around the driven coreand helps to prevent wrinkling of the web. In order that air directedinto the pathway along the web guide, may have the best effect, theguide is preferably shaped in the form of a shell or trough with liningpieces which seal against the core and/or supports therefor, or at leastrestrict any lateral escape of air from the pathway, so that all or mostof the air entering the pathway is constrained to flow along thispathway, with the web.

Apparatus according to the invention and as described hereinafter can beused for winding thin and wide webs as defined hereinbefore. There isfrictional contact with the web at only a few places in the apparatusbefore and during the cutting of the web so that there is little risk ofinjury to the web and the apparatus can in fact be used for windinglight-sensitive webs as manufactured in the photographic industry.

The driven core onto which the web section upstream of the line of cutis to be wound may be carried by a winder capable of carrying two ormore driven cores and swinging them successively into position ready forreceiving the next web section. Thus the winder may comprisecore-carrying arms rotatable about an axis for moving the coressuccessively into position for receiving a new length of web. Once a newweb length has begun to wind onto a core, this core, while continuing tobe driven, may be swung bodily away so that its former position is takenby an empty core and this empty core is ready to receive the next websection at the moment the web is severed again. The invention includesapparatus incorporating any such winder. If desired, conventionalwinders as presently available may be used.

An embodiment of the invention, selected by way of example will now bedescribed with reference to the accompanying drawings, in which:

FIGS. 1a and 1b show diagrammatically a vertical section of theapparatus in the inoperative position, including a conventional rollstand.

FIG. 2 is a horizontal section on line 22 of FIG. 4.

FIGS. 3 to 6 are sections similar to FIG. 1 and illustrate the apparatusin various phase of its cycle of operation, the roll stand beingomitted.

FIG. 7a is an enlarged cross-sectional view of the knife holder on line77 of FIG. 7b.

FIG. 7b is a partial and enlarged front view of the knife holder.

FIG. 8 is a diagram of the pneumatic circuit for the apparatus.

FIG. 9 is a diagram of the electric circuit for the apparatus.

The apparatus is mounted between two vertical columns 10 and 11 whichare spaced apart and arranged in parallelism and are rigidly secured bymeans of a base plate 12 and 13 to the floor (FIGS. 1b and 2).

At about half the height of the columns are provided bearings 14 and 15,wherein a shaft 16 is pivotally journalled. At the opposite side of thecolumns is provided a channel member 17 which extends horizontally fromone column to the other and wherein the rigid part of the air conducts(not shown) for the air motors are located.

The shaft 16 bears arms 18 and 19 rigidly secured at opposite endsthereof. The arms are reinforced by means of ribs, such as rib 20, whichare welded thereto and confer a T-shape cross-section to the arms. Atthe opposite side of the shaft 16 the arm 18 passes into a crank arm 22,the free end of which is pivotally attached to one end of adouble-acting air motor 24. This motor is pivotally secured at its upperend to the column 10 by stub shaft 26.

The arms 18 and 19 carry between them the free rotatable guide roller 27and the pressure roller 28 which is provided with a resilient covering29. The bearings of roller 28 are mounted for small displacements andthey are spring-biased towards the location of core 67, so that when thearms 18 and 19 are operated the roller 28 is resiliently urged againstthe core 67.

The arms 18 and 19 are further provided with sub shafts 30 and 31 onwhich the arms 32 and 33 are pivotally mounted. The arms 32 and 33 areconnected to each other through the free ends of the tube 34 to whichthe knife 35 is secured. The arms 32 and 33 are controlled bydouble-acting air motors 36 and 37, one end of which is pivotallyconnected to the arms, and the other end of which is pivotally securedto the crank arms, such as arm 22, which make part of the arms 18 and19.

A torque tube 40 is mounted for oscillation on the shaft 16 by means ofneedle bearings 42 and 43. Flanges 44 and 45 are welded to theextremities of the tube 40, and arms 46 and 47 secured to said flanges.The arm 47 asses at the opposite side of the tube 40 into a crank arm49, which is pivotally connected with its free end to one end of adouble-acting air motor 51. This motor is pivotally secured at its lowerend to the column 11 by stub shaft 53. For clearness sake, the air motor51 which would not be visible in FIG. 1b has been shown in broken lines.

The free ends of the arms 46 and 47 are curved and they carry a firstshell 54 in the form of a trough which is curved through about 180 andthe length of which exceeds the length of the core 67. A second shell 55which is curved through about is hingedly connected with the first shellon a transverse line, indicated by 52, which runs parallel to the axisof curvature of the shell. The shells which are made from sheet-iron,are reinforced by nose-like elongate ribs such as 56 and 57 and the freeend of the shell 54 is fitted to a transverse member 25 with U-shapedcross-section. The rib 57 is provided with an arm 58 which is locatedcentrally thereof, and which is pivotally attached to one end of thedouble-acting air motor 59. The other end of the motor is secured to alip 60 Welded on the tube 40.

Each of the columns 10 and 11 is further provided with a horizontallyprojecting support, such as the support 62 shown in FIG. lb, betweenwhich a free rotatable guide roller 61 is mounted.

In front of the arrangement just described is located a convenional rollstand 63 of the reversing type (FIG. 1a), having two pairs of drivencore plugs 64 and 65 for cores 66 and 67 to be mounted on both ends of areversible frame 68.

The roll stand is so mounted with respect to the columns 10 and 11 thatthe axis of curvature of the shell 54, indicated by numeral 69, maycoincide with the axis of the core 67 when the shell is put into theoperative position, thereby leaving an annular gap 91 (FIG. 2). Theframe of the roll stand has been provided at both ends with stationaryround core portions, such as 92 and 93, the diameter of which issubstantially equal to that of cores 66 and 67. The driven core plugs 64and 65 freely pass through the core portions. The ends of the coreportions are air-tightly fitted to the frame.

The lateral ends of the shells 54 and 55 are provided with pairs oflinings 94 and of resilient material, which air-tightly fit onto thecore portions 92 and 93 when the shell in the operative position islocated around the core.

Between the pairs of linings 94 and 95 are provided the pairs of linings96 and 97 which fit around the ends of the core 67 without contacting,however, said core.

The web course is indicated by numeral 70.

The FIGURES 3 to 6 illustrate the apparatus in various phases of itscycle of operation, the roll stand as well as a number of referencenumerals being omitted since they are not necessary for theunderstanding of the operation.

The arrangement of the knife 35 and the tube 34 is shown in detail inFIGS. 7a and 7b.

The tube 34 is composed of a heavy elongate metal bar 71 to which achannel member 72 of iron sheet has been hard-soldered so as to form atube of trapeziumlike cross-section. The sloping underside of the tubeis provided with two rows 73 and 74 of small circular openings.

The lateral ends of the tube are closed and the tube is provided at itstopside with pressure line unions such as the union 75. The mentionedunions are connected with flexible conduits to a rigid conduit that islocated in the channel member 17. The latter conduit is connected with ablower (not shown) so that on operation of the latter an overpressure isestablished in the tube 34, and a stream of air is produced at openings73, 74.

The knife 35 is composed of a plurality of small trapezium-like steelblades the form of one blade 76 being the reversed image of the adjacentblade 77. The free ends define a sawtooth profile, and the marginalportions 78 have been ground to obatin sharp cutting edges.

The blades are positioned on the bar 71 on a zone 79 of slightly reducedthickness to receive the blades. At each end of the zone 79 arectangular abutment plate 80 the thickness of which corresponds to thatof the blades, is hard-soldered to the bar 71, and the blades arearranged close to each other between both abutment plates.

The blades are clamped by means of the clamping plate 81, the strip ofspring leaf 82, and socket head screws 83 which are screwed in threadedbores of the clamping plate 81. The clamping plate is fixed to the bar71 by means of bolts 84. The strip 82 ensures the uniform distributionof the pressure forces of the screws 83 on the cutting blades.

The simplified pneumatic circuit for the apparatus is shown in theinoperative position in FIG. 8. It comprises the valves 120, 121 and 122with two positions four connections for controlling the air motors 36,37, 24, 59 and 51. The valves are retained in the illustrated positionby springs (not shown) and they are controlled by solenoids 100, 101 and102. Air pressure is regulated and lubricated by the constant pressureoutlet valve 124 and the lubricating device 125. Exhausted air is passedthrough a silencer 126. The simplified electric circuit for theapparatus is shown in FIG. 9. It comprises the main switch 103, theelectric motor 104 driving the air compressor, the motor 105 controlledby switch 107, for operating a blower for feeding the tube 34, thepush-button start switch 106, the relay A with the normalopen contacts aand a the solenoids 100, 101'and 102 for the valves 120, 121 and 122,the delay relay B with normal-closed contact 1;, and the microswitchcontacts 108 and 109.

The operation of the apparatus is as follows.

The apparatus being in the position as shown in FIGS. 1a and 1b, and theroll 21 being almost completed, the operator closes switch 107 in orderto start the blower to feed tube 34. After a few seconds the airpressure in the tube 34 has reached its nominal pressure and a stream ofair is produced at the openings 73 and 74.

The operator also engages the mechanism of the roll stand for startingcore 67 to rotate.

At the moment the roll 21 is completed, the operator actuates a startswitch 106. Relay A is excited and remains so through closed contact awhereas the closing of contact a energizes the solenoid 102.

Actuation of the valve 122 causes air motor 51 to retract, therebyrotating arms 46 and 47 in clock-wise direction so as to bring the shell54 in the position as shown in FIG. 3. At the moment the mentionedposition is taken, the arm 49 actuates the lever of a microswitch (notshown), the contact 108 of which closes the electric circuit of solenoid101.

Actuation of the valve 121 causes air motors 24 and 59 to retract,thereby rotating arms 18 and 19 in anti-clockwise direction until theircurved portion 112 rests on the core members 92 and 93 and bringing theshell 55 in the position as shown in FIG. 4.

Pressure roller 28 is driven by its resilient contact with thetravelling web and the rotating core 67, whereas guide roller 27deflects the course of the web past the nip between roller 28 and core67 to direct the web closely past the transverse edge 110 of the shell54. At the moment the arms 18 and 19 reach their operative position, amicroswitch (not shown) is actuated the contact 109 of which controlsthe circuit of solenoid 100.

Actuation of the valve 120 causes air motors 36 and 37- to extend,thereby swinging arms 32 and 33 in anticlock wise direction so that thetube 34 and the knife 35 take the position as shown in FIG. 5.

In swinging into the operative position, the knife 35 intercepts thepath of the web and servers the web while this is supported on the edge110 of the shell. The severed end of the web is wound on the roll 21whereas the newly formed leading end of the web is directed by thecutting edge of the knife 35 in the gap 91 between the core 67 and theshell 54.

The air stream blowing from the openings of the tube 34 deflects the newweb end and applies it against the periphery of rotating core 67.

Upon its further entering the gap between the core 67 and the shells 54and 55 the air stream creates an air cushion which rotates in the samedirection as the core and which smoothly applies the web against thecore.

The rotating air cushion leaves the gap at the free transverse edge 111of shell 55.

The new web end enters the nip between the roller 28 and the core 67 asit has made one revolution and it remains firmly secured to the core upfrom that moment by winding of the next windings.

The creation of the air cushion described, was assisted to aconsiderable extent by the linings 94 and 95 which prevented lateral airescape.

The linings 96 and 97, which do not contact the core since rotation ofthe latter would wear them excessively cause lateral air losses which,however, are small since the air entering the lateral space between thelinings 96, 97 and 94, 95 creates an overpressure which can only escapeat the opening between the transverse edges and 111 of the shells.

The creation of the air cushion was further assisted by the concavelycurved part 112 (FIG. 1b) of the arms 18 and 19, which corresponds inshape to the curvature of core portions 92 and 93, and closely reststhereon when the arms are in the operative position. Further help wasgiven by the shoulder portions 113 of the arms 18 and 19, which projectsinto the gap between the core 67 and the shell 54 at the transverse end110 and which prevents lateral air escape just below the tube 34.

The operative position of the different parts as shown in FIG. 5 lasts atime suifiicent for wrapping 1, 5 windings of the web onto the core 67.After that time the delay relay B becomes energized.

Upon the energizing of relay B, the contact b is opened so that thecircuit of the solenoids 102, 101 and 100, and of the relays A and Bbecomes currentless. The de-encrgizing of relay B causes contact b toclose again, but contacts a and a remain opened.

Valves 120, 121 and 122 return to their initial position so that airmotors 36 and 37 are made to retract whereas motors 24, 59 and 51 willextend.

Valves (not shown) are provided in the conduits leading from the valvesto the air motors, which ensure the timed response of the air motorswhen they return to their initial position, so that shell 55 will becompletely removed from the core 67 before arms 46 and 47 return, andthat arms 32 and 33 have already started to return before the arms 18and 19 are swung back;

The operator opens switch 107 so that-the blower feeding tube 34 isswitched off, and finally the apparatus takes the inoperative position,shown in FIG. 6.

The operator can now remove roll 21 from the roll stand and put an emptycore in place. The frame is rotated over in the direction of the arrowand the further winding of the web on the core 67 occurs at the positionpreviously taken by core 66.

It should be noted that the continuous travel of the web 70 has neitherbeen interrupted nor changed during the described operation. The speedof the web is determined by the treating apparatus it is leaving,whereas the tightness of the web is insured by the cores 66 and 67 whichare driven through the intermediary of slipclutches and which keep theweb at any movement tightened, without need of an accumulator devicebetween the treating apparatus and the severing and wrapping apparatus.

The friction applied to the web extends over only a limited part of itslength. The trailing end of the severed web has been gripped betweenpressure roller 28 and core 67 over some meters only, because theoperation of knife 35 is started almost immediately after the roller 28has reached its operative position. The newly formed leading end issubmitted to pressure from roller 28 over a length corresponding totwice the circumference of core 67, since a few windings of the websufiice to secure it to the core.

The described apparatus has been used for winding webs of polyester witha thickness of 0.02 mm. and a width of 1.20 m. on conventional woodencores with a diameter of 20 cm. The web speed amounted to 120 m./min. Itwas noticed that the winding of the web occurred without the slightesttrace of wrinkling.

The apparatus has further been used for winding webs of soft PVC with athickness of 0.2 mm. and a width of 1.10 m. on cores with a diameter ofcm. only. The overpressure produced by the air supply corresponded with280 mm. water column.

In the description hereinbefore it was said that the operation of theapparatus was normally started by the operator when the roll 21 hadobtained the limit at which the web should be severed.

It is clear that in practice the apparatus will preferably be controlledautomatically by sensing means responsive to the diameter of the roll 24wound on the core, or detecting a few meters upstream of the apparatusthe arrival of a splice in the web since the severing of the web willpreferably be done at or near the location of such splice in the web.

In an installation for coating light-sensitive layers on paper or filmwebs the automatic starting was realized as follows:

The operator who is concerned with the coating apparatus watches thepassage of a splice before a given point at the coating station, andpresses at that moment the start switch of a control mechanism. Acounter is engaged and is driven by the advancing web. The counterstarts from a preset value which corresponds to the distance to hetravelled by the web from the mentioned point at the coating stationthrough the drying station up to the severing station. At the moment thesplice approaches the severing station the counter has counted down tozero and causes the contact 106 of the electric circuit to close. In thementioned way, the Web is severed at about the locus of the formation ofthe splices at the unwinding station where successive rolls are joinedto each other in order to provide an uninterrupted web.

It is clear that the starting of the counter may also occurautomatically in that it is controlled by a sensing device which detectsthe passage of the splice.

The blower 105 has been continuously working during the operation of thearrangement just described. It is evident that it may also be controlledby the mentioned counter, taking care that it should be started inadvance of the operation of the severing station, in order to establishthe required air-pressure in the blower tube 34.

The apparatus is not limited to the described embodiment.

In its simplest form, the means defining the annular gap may be definedby the core 67 and the shell surrounding it. The omitting of liningssuch as 94, 95, 96 and 97, of the portions 113 on the arms 18 and 19, oreven of the cylindrical portions 92 and 93, cause considerable airlosses at the lateral sides of the shell, which must be compensated byan increased air pressure.

Occasionally, the air cushion may be amplified by feeding air throughopenings in the shell itself. In the apparatus of the describedembodiment this has been experimentally done by feeding air into thetransverse member 25, and in providing the shell 54 with openings on atransverse line 127 extending between the legs of the member 25 (seemodification in FIG. 6).

I claim:

1. Web winding apparatus for severing on a transverse line a webtravelling along a generally predetermined path and without interruptingthe travel of the web causing the web end upstream of the severance lineto wind onto a rotating core supported adjacent a locus on said path,which comprises an arcuate web guide plate adapted to extend partiallyaround the periphery of said core in generally closely spaced relationthereto, said arcuate plate stretching at least substantially the fullline of said core to define with the core periphery a threadingpassageway for said web and having one end thereof disposedsubstantially adjacent the web path on the downstream side of the coreto constitute an entrance to said passageway, said passageway extendingfrom said entrance away from the web path; a web cutter arranged alongthe web path for movement to and from an operative position proximate tosaid passageway entrance to sever said web along said transverse line,thereby generating a free end of said web at said passageway entrance;nozzle means on the side of said web opposite said web guide plate fordelivering a stream of air under pressure transversely across the web,said nozzle means being movable to an operative position proximate thepassageway entrance to direct said air stream into the passagewayentrance generally in the direction of said passageway, thereby to urgethe free web end to enter the passageway and press the web within thepassageway into contact with the periphery of the rotating core to causesaid end to become wound thereon.

2. The winding apparatus of claim 1 wherein said arcuate plate extendsaround said periphery for an angle of at least about 3. The windingapparatus of claim 1 wherein a roller is arranged upstream of the cutterand nozzle means on the same side of the web path therewith and isdisplaceable against the web to hold the web in contact with the coreperiphery preparatory to severance thereof.

4. The winding apparatus of claim 3 wherein said roller in saiddisplaced position is located adjacent the exit end of said passageway.

5. The winding apparatus of claim 1 wherein said web guide plate ismovable to an inoperative position remote from the core periphery aftersaid web end is wound upon said core to permit the winding of webpackages exceeding the working clearance between the plate and core.

6. The winding apparatus of claim- 5 wherein said web guide plateextends around the core periphery for more than an angle of 180 and isformed in arcuate sections fitting together, said sections beingseparable to permit the plate to be moved toward and away from the core.

7. The winding apparatus as in claim 6 wherein said plate sections arehinged together for relative pivotal movement to permit separationthereof.

8. The winding apparatus of claim 1 wherein said entrance end of saidguide plate carries means cooperating with said web cutter to shear saidweb along said transverse line.

9. The winding apparatus of claim 1 wherein said web is guided intocontact with a portion of the core periphery preparatory to severanceand the end of said guide plate opposite said entrance end terminatesproximate to the web path approaching said core periphery.

10. The winding apparatus as in claim 1 wherein said web cutter and saidnozzle means are integrally connected.

11. The winding apparatus of claim 1 wherein end seals are providedbetween said web guide plate and the core surface adjacent the endsthereof.

12. Apparatus according to claim 1, wherein said nozzle means fordelivering a stream of air comprises a blower tube movable together withthe web cutter and having openings therein disposed along at least oneline running transversely of the web path.

13. Apparatus according to claim 1, wherein said core supporting meansadapted to support a plurality of said cores and to move such coresbodily and successively into References Cited UNITED STATES PATENTS2/1954 Wolfe 24256 4/ 1957 Petersen et a1. 24256 XR Gurney et a1 24256Hornbostel 24256 Havens et a1 24256 Shabram 24265 Press 2425 6 Farrell24256 STANLEY N. GILREATH, Primary Examiner W. H. SCHROEDER, AssistantExaminer

